2007-2011 Polaris IQ Snowmobiles Service Manual, Page 135Get this manual
Maintenance NOTE: Always install new EV base gasketNever re-use the gasket, or modify new gasket
Exhaust Valve Springs CAUTION
Do not substitute different color springs on solenoid controlled EV enginesFREE LENGTH
Exhaust Valve Housing Fasteners 12 Ft.Lbs(16 Nm)Apply Loctite 242 7Reconnect the vent hosesNOTE: To obtain maximum exhaust valve performance, Polaris recommends using Polaris VES Gold Plus Synthetic Two-Stroke engine oilNever mix different brands of engine oilExhaust Valve Assembly G